Dear leah16,
Also hon, don't know which version you are running, but at the bottom of your screen on the right you should be able to see several icons, showing active programs. You can right click on each icon and see a box saying exit or close. Select that and then try running the defrag.
Would recomend that you purchase a good system utility software, such as Norton Utilities (speed disk is awesome), or maybe you can find someone to sell you a copy of System Suite, a reasonably priced product.
I'm sure it's not on the market anymore though in stores, they were bought out by somebody...
Good luck!
Um, if this still doesn't help you can right me at
soaringeagle2034@msn.com